For reference, this is John Lin who posts semi-frequent devlogs[0] of his voxel engine progress - an engine that is, in my opinion, one of the best voxel engines in existence rivaled only by Dennis Gustafsson's "Teardown" voxel engine.
It has destructible scenes, physics and even some gameplay. Much smaller & simpler scenes and not as good looking though. But pretty good for a 15 years old project!
Is it the one that started with ‘Why don't games simulate every blade of grass? Here I've single-handedly made an engine for that.’ I remember seeing that some a couple years ago, but IIRC it was going for more life-like look than this vid.
[0] https://www.youtube.com/watch?v=8ptH79R53c0